Flue-cleaner



2 Sheets-Sheet 1.

(Nb Model.)

J. M. HARTMAN.

PLUE GLBANER. l No. 253,862.' Patented Feb. 21,1882,

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PLUB-GLBANER.

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FLUE-CLEANER.

SPECIFICATION forming part of Letters Patent No. 253,862, dated February121, 1882.

Application tiled November 21, 1881. (No model.)

To all whom it may concern Be it known that I, JOHN M. HARTMAN, of Philadelphia, Pennsylvania, have invented a new Improvement in Fine-Cleaners, of which the following is a specication.

This invention relates to improved means for cleaning the hues of regenerative or other stoves where the lines are covered and where there is no opening directly over the flues to allow the scrapers to be worked from the outside ofthe covering of the llues.

It consists of, first, a detachable double drum with chains 5 second, a pivoted arm swinging under the covering ofthe lues; third, a Inovable sleeve with two sheaves and roller-bearings. I attain these objects bythe means illustrated in the following drawings, in which- Figure lis a vertical section .of a stove with the Hue-cleaner in position. Fig.2 is a plan of line-cleaner and top of stove. Fig. 3 is aplan of the flues of aregenerative stove. Fig. 4L is a side elevation of the flue-cleaner. Fig. 5 is a front elevation of the hue-cleaner.

Similar letters refer to similar parts throughout the several views.

Heretofore various devices have been used forcleaning the flues of regenerative stoves by goinginside of the stoves and passing weights or brushes attached to chains through the ues. This requires the stove to be cooled to allow the workman to go inside.

It has been proposed to combine a blow-off pipe and brush for cleaning the dues, as shown in E.A.Gowpers patent, February 7,1871; but this has not proved successful, as there is too much trouble in coupling the air-pipe, which,

is in short sections, `and which would require a workman to go inside of the stove. The air blown through this pipe is lost through the interstices of the walls and passes into the other flues without cleaning the lue through which it is passed. A sharp current must be maintained to remove the dust. It has been also proposed to clean the lines by a boom pivoted on the stove and swinging over the top of it. To this boom is attached a chain and weight lo pass through the ilues for cleaning them. This arrangement will clean any flues immediately under the doors on the top of the stove; but where a checker-work regenerator is used the number of openings is so great that only one-third of the checker openings or lues can be reached by this arrangement, as there is no means provided to carry the chain under the top ofthe stove for cleaning the flues between the door-openin gs. If a greater number of door-openings were placed in the top of the stove to lget at more of the ilues, the walls forming the top of the stove-lining would be so weakened that they would crush and be destroyed. I prefer to use a great number of lines, as perFig. 2, which increases the heating-surface, and cover the stoves with a dome having but one door opening in the center at the top. This dome is lined with fire-brick and has an opening in it at the top under the abovementioned door.

To clean the stove the above door is removed, the temporary brick stopper is taken out of the hole in the dome, and to the door-frame 7c is bolted the bearing l, which holds the vertical hollow shaft m. To this shaft is secured the arm n, which isfree to swing around under the dome and over the regenerator-ues. On this arm u is placed a sleeve, o, carrying the two sheaves p q, which have a motion endwise on their bearings to enable them to move freely to a position central over the llue while the scraper is passing down the line. When the chain pulls the weight up through an opening it should be kept clear of the flue-walls, or the chain will destroy them, as the lire-brick are soft, spongy, and easily crumbled. motion of the sheave will prevent this destruction of the walls.

To the sleeve o is attached a chain, r, which The end passing over the pulley s on the end of the arm,

and from thence over the pulley t, and from thence over the pulley u to the outside of the stove, and from thence over the pulley o to the sleeve o again,the workman can move the sleeve to any desired point on the arm by turning the handle 1o. v

To the scrapers .fr w are attached the chains y y', which pass over the sheaves p q a b' to the double drum c d', which is supported by the bearing c. This drum is made oftwoparts, c" d', and connected by the pinf, passing through the hole g'. This pin can be quickly entered and the drum, connected at any point. When the pin is in the holes gl h', say, the drum revolves as a whole; but when the pin is out of the holes the drums revolve separately. One end of each of the chains y y is attached to this doubledrnm. The chain y, having been passed over the pulleys a p, is attached tol the scraper which is then let down through one of the ues until it reaches the bottom. The second chain is then passed over the pulleys q b and attached to the scraper m', which is then passed down another flue. The drum el is now revolved by the crank t" and the scraper mi is drawn upto the top of the regenerator. The pin f is then placed in two opposite holes, which connects the two drums. By revolving the drum asnow connectedone scraperdeseends as the other ascend s, and two tlues are cleaned by the same motion and in the saine time that one .iine is cleaned with all other arrangements. One scraper balances the other, which dispenses with counter-balances, sheaves, and chains used in other arrangements. Suitable handles are attached to the vertical shaft m, at fr', to revolve it.4 Friction -rollers are used in all the sheavebearin gs to avoid friction and the use ot' oil, as the heat is so intense that the oil would be burned oi.

I disclaim the use of an arm swinging over the top of a stove for cleaning` the tlnes.

Ido not claim the door on the top of the dome, except in combination with the fluecleanei.

By this arrangement of a swinging arm nnder the dome and the scraper, as described, the stoves can be cleaned without cooling them down.

Regenerative stoves heat by the single-snrface system. The heat is taken up 'from the burning gas on the surface of the brick formlng the regenerator, and the heat is given ont from thesamesurface to the current of air passing after the stove is reversed or pnt on ablow. These stoves are intermittent in operation and require two or more stoves for continuous heating. Pipe-stoves, where the heat is taken up on one surface, transmitted through thc pipe, and given off on the opposite surface, belong to the doublesnrface system. They are con tinuous in operation.

The parts of the regenerative stove shown in Figs. 1, 2, 3 form no part of this patent.

I claiml. In combination with a regenerative stove, a line-cleaner, with an arm, sleeve, and scraper swinging under the dome of the stove.

2. In combination with a regenerative stove,

a line-cleaner having an arm swinging under the dome of the stove, with the chains o and sheaves t fv s u to change the position ot' the sleeve on the arm.

3, In combination with the flue-cleaner of a regenerative stove, the double drum c d', made in two pieces, the pinf-, the vchains y y', and Scrapers :v x'.

4. In combination with the line-cleaner ota regenerative stove, the arm n, swinging under the dome, the hollow shaft m, the bearing c', the drums c' d', the sleeve o, the chains r y y', the sheaves .t c s u, the sheaves e b' p (l, and Scrapers .r x'.

JOHN M. TIARTBIAN. 

